7.15 Advanced Scoring

Scoring on Subjects and From headers is nice enough, but what if you're
really interested in what a person has to say only when she's talking
about a particular subject? Or what if you really don't want to
read what person A has to say when she's following up to person B, but
want to read what she says when she's following up to person C?

By using advanced scoring rules you may create arbitrarily complex
scoring patterns.